CN106363021A - Rolling method for 1500MPa-grade titanium alloy bars - Google Patents

Rolling method for 1500MPa-grade titanium alloy bars Download PDF

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Publication number
CN106363021A
CN106363021A CN201610769497.2A CN201610769497A CN106363021A CN 106363021 A CN106363021 A CN 106363021A CN 201610769497 A CN201610769497 A CN 201610769497A CN 106363021 A CN106363021 A CN 106363021A
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China
Prior art keywords
titanium alloy
bar
1500mpa
alloy rod
bar stock
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CN201610769497.2A
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CN106363021B (en
Inventor
田琳
朱燕丽
侯峰起
张鹏
王凯旋
和永岗
刘向宏
冯勇
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Western Superconducting Technologies Co Ltd
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Western Superconducting Technologies Co Ltd
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    • BPERFORMING OPERATIONS; TRANSPORTING
    • B21MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21BROLLING OF METAL
    • B21B3/00Rolling materials of special alloys so far as the composition of the alloy requires or permits special rolling methods or sequences ; Rolling of aluminium, copper, zinc or other non-ferrous metals
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B21MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21BROLLING OF METAL
    • B21B1/00Metal-rolling methods or mills for making semi-finished products of solid or profiled cross-section; Sequence of operations in milling trains; Layout of rolling-mill plant, e.g. grouping of stands; Succession of passes or of sectional pass alternations
    • B21B1/16Metal-rolling methods or mills for making semi-finished products of solid or profiled cross-section; Sequence of operations in milling trains; Layout of rolling-mill plant, e.g. grouping of stands; Succession of passes or of sectional pass alternations for rolling wire rods, bars, merchant bars, rounds wire or material of like small cross-section
    • CCHEMISTRY; METALLURGY
    • C22METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22FCHANGING THE PHYSICAL STRUCTURE OF NON-FERROUS METALS AND NON-FERROUS ALLOYS
    • C22F1/00Changing the physical structure of non-ferrous metals or alloys by heat treatment or by hot or cold working
    • C22F1/16Changing the physical structure of non-ferrous metals or alloys by heat treatment or by hot or cold working of other metals or alloys based thereon
    • C22F1/18High-melting or refractory metals or alloys based thereon
    • C22F1/183High-melting or refractory metals or alloys based thereon of titanium or alloys based thereon

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Chemical & Material Sciences (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Crystallography & Structural Chemistry (AREA)
  • Materials Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Metal Rolling (AREA)
  • Forging (AREA)

Abstract

The invention discloses a rolling method for 1500MPa-grade titanium alloy bars. The method includes the steps of 1, selecting Ti-6Al-4Mo-4Zr-2Sn-2Cr-1Fe-1Nb bar billets; 2, in the atmosphere, heating the bar billets selected in the step 1 through a heating furnace and carrying out heat preservation treatment on the bar billets; 3, placing the bar billets obtained after the treatment in the step 2 on an open-train mill and heating and rolling the bar billets to obtain finished bar billets; and 4, sequentially carrying out solution treatment and aging treatment on the finished bar billets rolled in the step 3 and finally carrying out straightening and grinding to obtain the finished titanium alloy bars. According to the rolling method for the 1500MPa-grade titanium alloy bars, the tensile strength of rolled high-strength titanium alloy is greater than 1500MPa, the ductility can reach 10%, and the percentage of area reduction can reach 30%.

Description

A kind of milling method of 1500mpa level titanium alloy rod bar
Technical field
The invention belongs to non-ferrous metals processing method and technology field is and in particular to a kind of 1500mpa level titanium alloy rod bar Milling method.
Background technology
Because titanium alloy has higher specific strength, good corrosion resistance, and can be on active service at a higher temperature, by conduct Aircraft structure design and the main material manufacturing.For realizing a large amount of losss of weight, increasing thrust-weight ratio, improve flight speed and continuation of the journey energy The mesh ground of power, the nickel-base alloy of the steel of aircraft grid beam and electromotor manufacture is gradually replaced by titanium alloy.
With the development of Aeronautics and Astronautics technology, the alpha+beta titanium alloys for 1000mpa~1200mpa for the general tensile strength are not Can meet the requirement of airplane design, and tensile strength reach 1400mpa about its design strength of titanium alloy such as β 21s, β-c will Ask as 1300mpa, still steel alloy is being used in many parts of more than 1500mpa for military service intensity.Therefore, develop a kind of resisting Tensile strength reaches 1600mpa, and the superhigh intensity titanium alloy designing use intensity in 1500mpa level is to China's Aeronautics and Astronautics cause There are great progradations.
Content of the invention
It is an object of the invention to provide a kind of milling method of 1500mpa level titanium alloy rod bar, the high-strength titanium conjunction of rolling Golden tensile strength can reach 10% and 30% respectively more than 1500mpa, simultaneously elongation percentage and the contraction percentage of area.
The technical solution adopted in the present invention is, a kind of milling method of 1500mpa level titanium alloy rod bar, specifically according to Lower step is implemented:
Step 1, selection ti-6al-4mo-4zr-2sn-2cr-1fe-1nb bar stock;
Step 2, under air atmosphere, using in heating furnace heating stepses 1 select ti-6al-4mo-4zr-2sn-2cr- 1fe-1nb bar stock, and isothermal holding is carried out to it;
Step 3, will process through step 2 after the bar stock that obtains be positioned on open-train mill, heated be rolling to finished product Bar stock;
Step 4, will roll through step 3 after finished product bar stock, successively through solid solution, Ageing Treatment, finally align grinding To titanium alloy finished product bar, the titanium alloy finished product bar obtaining is nominal composition is ti-6al-4mo-4zr-2sn-2cr-1fe- 1nb, the small dimension titanium alloy rod bar more than 1500mpa for the tensile strength.
The feature of the present invention also resides in:
The ti-6al-4mo-4zr-2sn-2cr-1fe-1nb bar stock selecting in step 1, its standard is specific as follows:
The cross-sectional diameter of ti-6al-4mo-4zr-2sn-2cr-1fe-1nb bar stock be 45mm~55mm, surface be with The casting skin of oxide layer or through stripping off the skin process, and horizontal organization and longitudinal tissue uniform.
In step 2, heating furnace uses resistance-type heating furnace.
In step 2, heating-up temperature is 780 DEG C~900 DEG C.
In step 2, temperature retention time is 1h~2h.
During the heating rolling of step 3: deflection total amount is 85.0%~98.0%, the pass system of open-train mill For circle-flat-side, through 8 road~18 passes, every time deflection is 10%~30%.
The beneficial effects of the present invention is:
(1) milling method of a kind of 1500mpa of present invention level titanium alloy rod bar, can produce a kind of tensile strength and exceed 1500mpa, elongation percentage and the contraction percentage of area small dimension ti-6al-4mo-4zr-2sn-2cr- more than 10% and 30% respectively 1fe-1nb titanium alloy rod bar.
(2) milling method of a kind of 1500mpa of present invention level titanium alloy rod bar, solves current high-strength titanium alloy and does not possess The problem of High-strength high-plasticity, has filled up the blank of the high-strength high-ductility titanium alloy in 1500mpa level for China's Service Environment.
Brief description
Fig. 1 is the ti-6al-4mo-4zr- of the milling method rolling using a kind of present invention 1500mpa level titanium alloy rod bar The high power micro-organization chart of longitudinal tissue of the little bar of 2sn-2cr-1fe-1nb;
Fig. 2 is the ti-6al-4mo-4zr- of the milling method rolling using a kind of present invention 1500mpa level titanium alloy rod bar The horizontal organization high power micro-organization chart of the little bar of 2sn-2cr-1fe-1nb;
Fig. 3 is the ti-6al-4mo-4zr- of the milling method rolling using a kind of present invention 1500mpa level titanium alloy rod bar The mechanical property figure of the little bar of 2sn-2cr-1fe-1nb.
Specific embodiment
The present invention is described in detail with reference to the accompanying drawings and detailed description.
A kind of milling method of present invention 1500mpa level titanium alloy rod bar, specifically implements according to following steps:
A kind of milling method of present invention 1500mpa level titanium alloy rod bar, specifically implements according to following steps:
Step 1, selection ti-6al-4mo-4zr-2sn-2cr-1fe-1nb bar stock, selection standard is specific as follows:
The cross-sectional diameter of ti-6al-4mo-4zr-2sn-2cr-1fe-1nb bar stock be 45mm~55mm, surface be with The casting skin of oxide layer or through stripping off the skin process, and horizontal organization and longitudinal tissue uniform.
Step 2, under air atmosphere, using in heating furnace heating stepses 1 select ti-6al-4mo-4zr-2sn-2cr- 1fe-1nb bar stock, and isothermal holding is carried out to it;
Wherein, heating furnace uses resistance-type heating furnace, and in heating process, heating-up temperature is 780 DEG C~900 DEG C;Insulation Time is 1h~2h.
Step 3, will process through step 2 after the bar stock that obtains be positioned on open-train mill, heated be rolling to finished product Bar stock;
During heating rolling: deflection total amount is 85.0%~98.0%, the pass system of open-train mill be circle- Flat-side, through 8 road~18 passes, every time deflection is 10%~30%.
Step 4, will roll through step 3 after finished product bar stock, successively through solid solution, Ageing Treatment, finally align grinding To titanium alloy finished product bar, the titanium alloy finished product bar obtaining is nominal composition is ti-6al-4mo-4zr-2sn-2cr-1fe- 1nb, the small dimension titanium alloy rod bar more than 1500mpa for the tensile strength.
Obtained using a kind of milling method of present invention 1500mpa level titanium alloy rod bar is that a kind of tensile strength reaches 1610mpa, elongation percentage reaches 12%, and reduction of area is 40% small-sized bar.
Embodiment 1
Select ti-6al-4mo-4zr-2sn-2cr-1fe-1nb bar stock, selection standard is:
The cross-sectional diameter of ti-6al-4mo-4zr-2sn-2cr-1fe-1nb bar stock is 45mm, and surface is with oxide layer Casting skin or through stripping off the skin process, and horizontal organization and longitudinal tissue uniform;
Under air atmosphere, the ti-6al-4mo-4zr-2sn-2cr-1fe-1nb that stove heat selects is heated using resistance-type Bar stock, heating-up temperature is 780 DEG C, and carries out isothermal holding to it, and temperature retention time is 1h, obtains pieces of bar stock;
Pieces of bar stock is positioned on open-train mill heating rolling to finished product bar stock, during heating rolling: become Shape amount total amount is 85.0%, and the pass system of open-train mill is circle-flat-side, and through 8 passes, every time deflection is 15%~30%;
By the finished product bar stock after rolling, successively through solid solution, Ageing Treatment, finally aligning grinding is to titanium alloy finished product rod Material, the titanium alloy finished product bar obtaining is nominal composition is ti-6al-4mo-4zr-2sn-2cr-1fe-1nb, and tensile strength surpasses Cross the small dimension titanium alloy rod bar of 1500mpa.
Embodiment 2
Select ti-6al-4mo-4zr-2sn-2cr-1fe-1nb bar stock, selection standard is:
The cross-sectional diameter of ti-6al-4mo-4zr-2sn-2cr-1fe-1nb bar stock is 50mm, and surface is with oxide layer Casting skin or through stripping off the skin process, and horizontal organization and longitudinal tissue uniform;
Under air atmosphere, the ti-6al-4mo-4zr-2sn-2cr-1fe-1nb that stove heat selects is heated using resistance-type Bar stock, heating-up temperature is 900 DEG C, and carries out isothermal holding to it, and temperature retention time is 1.5h, obtains pieces of bar stock;
Pieces of bar stock is positioned on open-train mill heating rolling to finished product bar stock, during heating rolling: become Shape amount total amount is 95.0%, and the pass system of open-train mill is circle-flat-side, and through 14 passes, every time deflection is 10%~22%;
By the finished product bar stock after rolling, successively through solid solution, Ageing Treatment, finally aligning grinding is to titanium alloy finished product rod Material, the titanium alloy finished product bar obtaining is nominal composition is ti-6al-4mo-4zr-2sn-2cr-1fe-1nb, and tensile strength surpasses Cross the small dimension titanium alloy rod bar of 1500mpa.
Embodiment 3
Select ti-6al-4mo-4zr-2sn-2cr-1fe-1nb bar stock, selection standard is:
The cross-sectional diameter of ti-6al-4mo-4zr-2sn-2cr-1fe-1nb bar stock is 55mm, and surface is with oxide layer Casting skin or through stripping off the skin process, and horizontal organization and longitudinal tissue uniform;
Under air atmosphere, the ti-6al-4mo-4zr-2sn-2cr-1fe-1nb that stove heat selects is heated using resistance-type Bar stock, heating-up temperature is 780 DEG C, and carries out isothermal holding to it, and temperature retention time is 2.0h, obtains pieces of bar stock;
Pieces of bar stock is positioned on open-train mill heating rolling to finished product bar stock, during heating rolling: become Shape amount total amount is 98.0%, and the pass system of open-train mill is circle-flat-side, and through 18 passes, every time deflection is 18%~30%;
By the finished product bar stock after rolling, successively through solid solution, Ageing Treatment, finally aligning grinding is to titanium alloy finished product rod Material, the titanium alloy finished product bar obtaining is nominal composition is ti-6al-4mo-4zr-2sn-2cr-1fe-1nb, and tensile strength surpasses Cross the small dimension titanium alloy rod bar of 1500mpa.
By Fig. 1 and Fig. 2 it can be seen that can be given birth to using a kind of milling method of present invention 1500mpa level titanium alloy rod bar Output longitudinal tissue and the little bar of the uniform ti-6al-4mo-4zr-2sn-2cr-1fe-1nb of horizontal organization.
As shown in figure 3, being become using the titanium alloy that a kind of milling method of present invention 1500mpa level titanium alloy rod bar is produced Product bar, its tensile strength has exceeded 1500mpa.
A kind of milling method of present invention 1500mpa level titanium alloy rod bar, solve current high-strength titanium alloy do not possess anti- More than 1500mpa, elongation percentage and the contraction percentage of area do not reach 10% and 30% problem to tensile strength simultaneously.

Claims (6)

1. a kind of milling method of 1500mpa level titanium alloy rod bar is it is characterised in that specifically implement according to following steps:
Step 1, selection ti-6al-4mo-4zr-2sn-2cr-1fe-1nb bar stock;
Step 2, under air atmosphere, using in heating furnace heating stepses 1 select ti-6al-4mo-4zr-2sn-2cr-1fe- 1nb bar stock, and isothermal holding is carried out to it;
Step 3, will process through step 2 after the bar stock that obtains be positioned on open-train mill, heated be rolling to finished product bar stock;
Step 4, will roll through step 3 after finished product bar stock, successively through solid solution, Ageing Treatment, finally aligning grinding to titanium Alloy finished product bar, the titanium alloy finished product bar obtaining is nominal composition is ti-6al-4mo-4zr-2sn-2cr-1fe-1nb, The small dimension titanium alloy rod bar more than 1500mpa for the tensile strength.
2. a kind of milling method of 1500mpa level titanium alloy rod bar according to claim 1 is it is characterised in that described step The ti-6al-4mo-4zr-2sn-2cr-1fe-1nb bar stock selecting in rapid 1, its standard is specific as follows:
The cross-sectional diameter of ti-6al-4mo-4zr-2sn-2cr-1fe-1nb bar stock is 45mm~55mm, and surface is with oxidation The casting skin of layer or through stripping off the skin process, and horizontal organization and longitudinal tissue uniform.
3. a kind of milling method of 1500mpa level titanium alloy rod bar according to claim 1 is it is characterised in that described step In rapid 2, heating furnace uses resistance-type heating furnace.
4. a kind of milling method of 1500mpa level titanium alloy rod bar according to claim 1 is it is characterised in that described step In rapid 2, heating-up temperature is 780 DEG C~900 DEG C.
5. a kind of milling method of 1500mpa level titanium alloy rod bar according to claim 1 is it is characterised in that described step In rapid 2, temperature retention time is 1h~2h.
6. a kind of milling method of 1500mpa level titanium alloy rod bar according to claim 1 is it is characterised in that described During the heating rolling of step 3: deflection total amount is 85.0%~98.0%, the pass system of open-train mill be circle-flat- Side, through 8 road~18 passes, every time deflection is 10%~30%.
CN201610769497.2A 2016-08-30 2016-08-30 A kind of milling method of 1500MPa grades of titanium alloy rod bar Active CN106363021B (en)

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN107214207A (en) * 2017-05-22 2017-09-29 西部超导材料科技股份有限公司 A kind of processing method of high uniform beta titanium alloy bar

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2011236503A (en) * 2010-05-12 2011-11-24 Boehler Schmiedetechnik Gmbh & Co Kg Method for producing member of titanium-aluminum base alloy, and member
CN102712967A (en) * 2010-01-22 2012-10-03 Ati资产公司 Production of high strength titanium alloy
CN102978437A (en) * 2012-11-23 2013-03-20 西部金属材料股份有限公司 Alpha plus beta two-phase titanium alloy and method for processing same
CN104532057A (en) * 2014-12-11 2015-04-22 西部超导材料科技股份有限公司 Ti6242 titanium alloy and preparation method of small-size bar thereof
US20150184272A1 (en) * 2012-09-14 2015-07-02 Beijing University Of Technology Low cost and high strength titanium alloy and heat treatment process
CN105251804A (en) * 2015-10-28 2016-01-20 西部超导材料科技股份有限公司 Rolling method for TC6 titanium alloy hexagonal rod

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102712967A (en) * 2010-01-22 2012-10-03 Ati资产公司 Production of high strength titanium alloy
JP2011236503A (en) * 2010-05-12 2011-11-24 Boehler Schmiedetechnik Gmbh & Co Kg Method for producing member of titanium-aluminum base alloy, and member
US20150184272A1 (en) * 2012-09-14 2015-07-02 Beijing University Of Technology Low cost and high strength titanium alloy and heat treatment process
CN102978437A (en) * 2012-11-23 2013-03-20 西部金属材料股份有限公司 Alpha plus beta two-phase titanium alloy and method for processing same
CN104532057A (en) * 2014-12-11 2015-04-22 西部超导材料科技股份有限公司 Ti6242 titanium alloy and preparation method of small-size bar thereof
CN105251804A (en) * 2015-10-28 2016-01-20 西部超导材料科技股份有限公司 Rolling method for TC6 titanium alloy hexagonal rod

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN107214207A (en) * 2017-05-22 2017-09-29 西部超导材料科技股份有限公司 A kind of processing method of high uniform beta titanium alloy bar

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